The NCAA seems to be taking the issue of transfers very seriously, as the working group created to look at the issue has been reviewing several different proposals.
Among them include changes that would prevent schools from blocking transfers to other specific schools. This is often done to prevent a player from transferring to another school in that particular conference or to a school that they will compete against in the near future.
One other rule that seems to consistently pop up each year involves players wishing to leave after coaching changes. A proposed rule being looked at would allow players to have immediate eligibility if the coach who they signed to play under leaves following National Signing Day.